Fuel System

Fuel System

Note the following when working on the fuel system:

There is a risk of injury because the fuel is under very high pressure.

• Reduce the fuel pressure down to residual pressure before opening the high pressure area of the fuel injection system.

• To reduce remaining residual pressure, place a clean cloth around the connector and carefully loosen connector.

Burn risk due to escaping fuel.

• Because the Transfer Fuel Pump (FP) (G6) runs briefly when the battery is connected and the driver's door is opened, the voltage supply to the transfer FP must be disconnected before opening the fuel system.

- Remove the fuse for the Fuel Pump (FP) control module (J538) ; fuse assignment.

To prevent personal injury and damage to the injection and ignition system, observe the following:

• Turn off the ignition before disconnecting and connecting the wiring for the injection and ignition system. This includes tester cables as well.

• Only clean the engine with ignition turned off.

• If the connectors were disconnected and the engine was started, then malfunctions have been stored in the Engine Control Module (ECM) Diagnostic Trouble Code (DTC) memory: Generate readiness code in Guided Functions using the vehicle diagnostic tester.

Risk of destroying electronic components when disconnecting the battery.

• Observe measures for disconnecting battery.

• Only disconnect the battery with ignition turned off.

- Disconnect the battery.